Debian DSA-1812-1 : apr-util - denial of service

High Nessus Plugin ID 39333


The remote Debian host is missing a security-related update.


Apr-util, the Apache Portable Runtime Utility library, is used by Apache 2.x, Subversion, and other applications. Two denial of service vulnerabilities have been found in apr-util :

- 'kcope' discovered a flaw in the handling of internal XML entities in the apr_xml_* interface that can be exploited to use all available memory. This denial of service can be triggered remotely in the Apache mod_dav and mod_dav_svn modules. (No CVE id yet)
- CVE-2009-0023 Matthew Palmer discovered an underflow flaw in the apr_strmatch_precompile function that can be exploited to cause a daemon crash. The vulnerability can be triggered (1) remotely in mod_dav_svn for Apache if the 'SVNMasterURI' directive is in use, (2) remotely in mod_apreq2 for Apache or other applications using libapreq2, or (3) locally in Apache by a crafted '.htaccess' file.

Other exploit paths in other applications using apr-util may exist.

If you use Apache, or if you use svnserve in standalone mode, you need to restart the services after you upgraded the libaprutil1 package.

The oldstable distribution (etch), these problems have been fixed in version 1.2.7+dfsg-2+etch2.


Upgrade the apr-util packages.

For the stable distribution (lenny), these problems have been fixed in version 1.2.12+dfsg-8+lenny2.

See Also

Plugin Details

Severity: High

ID: 39333

File Name: debian_DSA-1812.nasl

Version: 1.21

Type: local

Agent: unix

Published: 2009/06/08

Updated: 2019/08/02

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.8

Temporal Score: 6.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:apr-util, cpe:/o:debian:debian_linux:4.0, cpe:/o:debian:debian_linux:5.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2009/06/04

Reference Information

CVE: CVE-2009-0023, CVE-2009-1955

DSA: 1812

CWE: 119, 399